Google’s Quantum Chip Might Do Calculations In Parallel Universes

Google recently announced advancements in quantum computing, revealing its new quantum chip, “Willow.” According to Google Quantum AI lead Hartmut Neven, this chip can significantly reduce errors as more qubits are added, addressing major challenges in quantum computing like decoherence.

Google claims Willow is a step toward making quantum computers “commercially relevant” by outperforming traditional computers at certain tasks. And as Google says, these calculations may be taking place in parallel universes.

Neven highlighted a benchmark where Willow completed a computation in under five minutes—a task that would take the fastest supercomputers 10 septillion years (more time than the entire age of the universe).

“Willow performed a standard benchmark computation in under five minutes that would take one of today’s fastest supercomputers 10 septillion (that is, 10²⁵) years — a number that vastly exceeds the age of the Universe,” Hartmut Neven, founder and lead of Google Quantum AI, explained in a press release.

However, the calculation in question, generating a random distribution, has no practical application. Physicist Sabine Hossenfelder pointed out that similar claims were made in 2019 but were later challenged.

Despite progress, quantum computers remain impractical for most real-world uses. Google recently launched a $5 million competition to encourage practical applications of quantum computing. Excitement is tempered by the realization that the technology still has a long way to go.

A surprising aspect of Google’s announcement was Neven’s reference to quantum computation supporting the “multiverse” theory. He suggested calculations might involve parallel universes, an idea tied to David Deutsch’s concept of “quantum parallelism” in the Many Worlds interpretation of quantum mechanics.

This interpretation posits that instead of collapsing, the wave function branches into multiple universes during observation.

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Quantum mechanics, the foundation of quantum computing, allows particles to exist in superposition—being in multiple states simultaneously. Quantum computers harness this property, along with entanglement and interference patterns, to solve complex problems.

However, the Many Worlds interpretation is just one perspective among others, such as the Copenhagen interpretation and hidden variable theories.

While quantum computers do not depend on a specific interpretation, Neven’s remarks about the multiverse are speculative. As it stands, there’s no evidence that quantum computations occur across multiple universes.

Though Google’s achievements in quantum computing are remarkable, they remain a step in a long journey, with practical use cases and proof of multiverse interactions still out of reach.